Mold for forming silo-staves.



W. L. CUTLER.

MOLD FOR FORMING SILO SI'AVES.

APPLICATION FILED MAR. II, l(916.

@mum/woz futon/w11 Patented Oct. 3,1916.

\/\/. L.. C UTLER man@ s'rarns PATENT orrron WILLIS L. .CUTLEEL OFLEGRAND, IOWA, ASSIGNOR 0F ONE-HALF TO FRANK R.

`ENS.VII1\TClrEIR., 0F GILIVIAN, IOWA.

Specicaton of Letters Patent.

Patented Oct. 3, 1916.

Application filed March 11, 1916. Serial No. 83,625. y y

7% all whom t may concern: v

Be it known that I, WILLIS L. CU'rLER, a' citizen of the United States,residing at Legrand, in the county of Marshall and State of Iowa, haveinvented certain new and useful Improvements in Molds for FormingSilo-Staves, of which the following is a specication7 reference beinghad to the accompanying drawings.

This invention relates to molds for forming concrete articles, andparticularly to molds for forming silo staves.

The general obj ect of this invention is the provision of a mold soconstructed that a plurality of concrete silo staves maybe formed at onetime, and further so constructed that the mold may be readily opened toremove the completed staves or closed into position whereby the stavesmay be formed.

A further object of the invention is to provide improved means wherebythe sections of the mold may be held in proper rectangular relation orsquared.

Still another object of the invention .is the provision of a mold havinglongitudinally extending partition members and side members so formed asto form a stave with a conveXity on one edge face and a concavity on theopposite edge face,- whereby the s1lo staves may fit into each other,and, 1n a measure, interlock.

Still another object is to provide improved means for interlocking thelongitudinally extending division members' of the mold. into engagementwith the outer walls of thev mold and improved means for locking thesections of the mold into rectangular relation when assembled.

Other objects will appearin the course of the following description.

My invention is illustrated in the accompanying drawings, wherein:

Figure 1 is a top plan view of a mold constructed in accordance with mylnvention, showing concrete inplace in two of the mold spaces; Fig. 2 isa section on the line 2-2 of Fig. l; Fig. 3 is a fragmentary section onthe line 3-3 of Fig. 1; Fig. iis an enlarged cross section of one of theintermediate walls 24; Fig. 5 is a fragmentary perspective view of oneof the intermediate walls 24, showing the ear 29; Fig. 6 is afragmentary elevation of a portion of the walls 11 and showing thelatch; Fig.`7 1s a perspective View of the means for hmgedly connectingthe'end and sidewalls to eachl other; and Fig. 8 is a fragmentary planview of the hinge end of wall 11.

Referring to the drawings, -it will be seen that my lmproved.moldcomprises a side member 10, an opposed side member 11 and theopposed end members 12 and 13. The member 12 is formed with an angulareXtension 14 designed to engage over the adjacent` end of the member 10and be bolted or otherwise attached thereto, as by means of the screws15,so thatthe member 12 will be held in right-angular relation to themember 10. The member 12 is formed on its extremity with an ear or .ears16, and the member 11 is formed upon its end face but outwardV of itsinner face vwith a corresponding ear or ears 17. If there is one earupon the member 12 then the'member 11 is formed with two ears spacedfrom each other to admit the ears16 between them. If on the other handthe member 12 is formed with two ears, then the member 11 is formed withone ear adapted to be disposed between the two ears on the member 12.The ears are connected to each other by a pintle 18. The number of earson the members 11 and 12 is not essential to my invention, but it isessential that the ears 17 shall be spaced from the inner face of themember 11, as illustrated clearly in Fig. 8. The member 10 isA againstthe inner facesof the members 13V and 12respectively, and thus themembers 11V and 13 will beheld in rectangular relation to the members 12and 10, respectively. The side wall-11 is provided with a loop or eye 19and the extremity of the end wall 13 is also formed with aneye 20 whichproj ectsY beyond the extremity of they end wall, and coacting withthese eyes is a latch 21, one

vend of which is angularly bent and e'Xtends down through the loop oreye 20 and is headed, -as at 22, while the other end is downwardly bentand is adapted to be extended downward through the eye 19 to thus latchkthe side wall 11 to the end wall 13.

At spaced intervals the walls 12 and 13 vare formed at their upper andlower corners on their inner faces with concave recesses 23, and adaptedto be disposed between the end walls 12 and 13 and engaged in theserecesses are the dividing or partition walls 24. I have illustrated twoof these walls but it will be understood thatthe number of walls willdepend upon the capacity of the mold and that more than two may be used,if desired. Both of these walls are alike and each wall is formed uponone face with a longitudinally extending concavity 25 andy that itsother face is. longitudinally convex,

as at 26. The concave face 25 extends'nearlythe height of the wall 24Vand Vthen connects with ithe upper and lower faces yof the wall by astraight vertical portion 27. The convex face 26 is nearly the height ofthe wall and connectswith theupper and lower Afaces of the wall by aninclined 'face 28, as shown V most clearlyin Fig. 4. At its oppositeends each of the dividing or partition walls 24 is provided with-theoutwardly projecting ears 29 which are-adapted to engage vin therecesses 23 and have rounded end faces for that purpose. The end facesof the intermediateportion ofthe wall 24, between the ears 29, isvertical and its flat against the inner faces of the walls A12 and 13.(See Fig. r Y

rlhe inner face of the side wall 10 is made with a concavity 30, of thesame form as the concavity 25 inthe partition walls 24, and

the inner face of the side wall 11 is made with a convexity of exactlythe same char- ,acter as the convexity 26 on the partition wall.

In practical use, the dividing walls 24 are disposed between the wallsl2 and 13 with the ears 29 engaged in the recess-es 23, and interlockedthereby with the walls 12 and 13. The wall 13 is closed against'the endsof the walls 24, 10 and 11, and locked by means of the `latch 21.Concrete or othersemi-liquid cementitious material is then poured intothe mold spaces and when it has sufficientlyhardened the latch isreleased and the end wall 13 opened. The release of the latch 21 permitsthe'end walls 11 and 13 both to be opened, thus permitting the firstblock to be readily taken out, the iirst division wall 24 readilyremoved, then the second block takenV leases the strain upon the moldthat all of the blocks may practically be taken outl at one time, ornearlyso.

The form of the block made in the mold illustrated is shown in Fig. 2,and it will be seenthat the blocks so formed have to an extentinterlocking engagement with each other and also that the blocks may bedisposed in angularrelation with each other so as to form the walls ofapproximately round silos, if this is desired. The sections of the moldmay be entirely disconnected from each other byiremoving the pintles 18,and the wall 12 may be readily disconnected from the wall 10 by removingthe bolts or screws 15. Thus the mold may be-'put into very portableVform and readily transported Yand set up. 'The form or mold is.preferably made of cast iron, though it may be made of other suitablematerial. By the use of forms or molds-ofthis character, concrete slabsfor silos or other structures may be readily and cheaply made,V and theoutputv of these slabs very 4greatly increased.

`Having described Athe invention, whatd claim is:

1. A mold for forming concrete slabs including oppositely disposed endand side walls, one of the end walls being hinged to one of the sidewalls and the other end wall being hinged to the other side Wall, thefirstnamed end wall andthe last-named side wall being rigidly connectedto each other in rectangular relation, a latch for holding the walls inAquadrangular relation, and inter'- mediate vpartition walls having attheir ends upper and lower 4projecting ears, the end walls being formedwith upper and lower recesses to receive said ears, said ears beingrounded and the recesses being correspondingly rounded, whereby thepartition walls may be shifted into angular relation to the side wallsto remove them.

2. In a mold of the character described, an end and a side wall, the endwall having an angular portion overlapping` the side wall and detachablybolted thereto and an end and a sidewall each pivotally engaged with thefirst-named end and side walls, and a latch carried by the pivoted endwall and engaging the pivoted side wall to thereby lock the walls inrectangular position.

, In testimony whereof 'I hereunto affix my signature in the presence oftwo witnesses.

WILLIS L. CUTLER.

lVVitnesses: p

F. B. GILBERT, F. M. HARADON.

Copies of this patent may be obtained .'for ve cents each, by addressingthe Commissioner of Patents, Washing-tomi). C.

